Range from the cheapest single storey extension £46800 (Pillar Contractors Ltd based in W1K) to the dearest single storey extension £48880 (UCS UK Ltd based in W1W).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in Harley Street by posting a job with HaMuch and we will send it to extension builders in Harley Street.
Job | Estimate |
Underpinning a house | £17408 |
Build a two storey extension | £87863 |
Build a timber frame extension | £25908 |
Install a swimming pool | £80908 |
Cost to build a single storey extension | £48170 |
Cost to build a side return extension | £36470 |
Install an RSJ | £2108 |
Build an outbuilding | £9908 |
Build a mansard loft conversion | £51908 |
Cost of a loft conversion | £32892 |
Build a kitchen extension | £41908 |
Build a hip to gable loft conversion | £41908 |
Build a granny annexe | £86908 |
Build a garden office | £9908 |
Convert a garage | £15908 |
Build a new garage | £18408 |
Build a flat roof extension | £21908 |
Build a dormer loft conversion | £41908 |
Lay a concrete foundation | £6158 |
Convert a bungalow loft | £28908 |
Basement conversion cost | £36470 |